231235380 has 36 divisors (see below), whose sum is σ = 701414532. Its totient is φ = 61662720.

The previous prime is 231235373. The next prime is 231235391. The reversal of 231235380 is 83532132.

231235380 is a `hidden beast` number, since 2 + 3 + 123 + 538 + 0 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 167650704 + 63584676 = 12948^2 + 7974^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 642141 + ... + 642500.

It is an arithmetic number, because the mean of its divisors is an integer number (19483737).

Almost surely, 2^231235380 is an apocalyptic number.

231235380 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

231235380 is an abundant number, since it is smaller than the sum of its proper divisors (470179152).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

231235380 is a wasteful number, since it uses less digits than its factorization.

231235380 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1284656 (or 1284651 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 27.

The square root of 231235380 is about 15206.4256155087. The cubic root of 231235380 is about 613.7875776689.

The spelling of 231235380 in words is "two hundred thirty-one million, two hundred thirty-five thousand, three hundred eighty".